Backup Lamps

The BTSI BU 21 fuse in the instrument panel fuse block supplies battery positive voltage to the park neutral position switch (automatic) or backup lamp switch (manual). When the gear selector lever is in the REVERSE position, power is supplied to both of the backup lamps. The backup lamps are grounded at G401.

The BCM also can control the backup lamps for theft deterrent operations. Battery positive voltage is applied at all times from the APPROACH fuse 2 to the coil and switched side of the BACKUP relay 38. When the BCM detects a theft alarm activation or deactivation, the BCM will apply a ground to the BACKUP relay coil. Battery positive voltage is then applied to the backup lamps flashing them ON.